function [ status ] = mx_eyelink_close( send_msg )
%MX_EYELINK_CLOSE Sends a disconnect message to the EyeLink tracker, resets
% the link data system.
%
% Parameters:
% send_msg 	Usually <send_msg> is 1. However, 0 can be used to reset the eyelink
% system if it is listening on a broadcast session.
% Returns:
% 0 if successful, otherwise link error.
%
%----------------------------------------------------------------------------
% Copyright Eduardo Aponte 2013
% aponteeduardo@gmail.com